Hello, yes indeed there is! I own a 16LS myself, and I have spoken with Knut at CJ. The upgrade will involve a rebuild much like the one done to the original ART. Knut told me that the upgrade will make the 16LS the sonic egual of the original ART. CJ will not begin to offer the upgrade for awhile, at least not until most of the original ART's have been upgraded (probably the end of the year). The cost for the 16LS upgrade has not yet been established. I love my current 16LS. While there are many superb preamps out there, this one has been the most musically satisfying. I plan to upgrade my unit when that option becomes available. Happy Listening!
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